Remember back when BlackBerry was getting things ready for the BlackBerry 10 launch and they updated some specific PlayBook apps for BlackBerry 10 without any need for developers to make changes? Well, they're doing it again only this time around it's BlackBerry Z10 apps that will be automatically updated with BlackBerry Q10 compatibility. According to the email sent out, specific apps that have been tested will be marked as supported on the BlackBerry Q10. 

Your app works great on BlackBerry Q10
We tested your BlackBerry Z10 app and we'’re happy to report that it doesn't require any changes in order to run on the soon-to-be-released BlackBerry Q10 smartphone! We are going to automatically port it over so you can get it in front of app-hungry BlackBerry Q10 users. If you don'’t want us to automatically port your app over to BlackBerry Q10 right now, please let us know by filling out the Opt Out form. You must opt out by May 15, 2013 or your app will be automatically ported.

Again, just like before and as noted, developers do have the option to opt out should they already be working on a BlackBerry Q10 compatible version or otherwise not want their app changed over. If you're a developer and fall into that are, now would be a good time to make sure to check your emails just in case it ended up in spam.